{
 "version": "2026-10-20",
 "license": "Dimension sheets: CC BY 4.0. Standard and published-size files: CC BY 4.0. Xem Studio's own designs (files_license = Xem Studio Design License): free to use and sell things from, not to redistribute as files — https://xemstudio.com/license/. Other publishers' files: their own license, linked beside them.",
 "slug": "keyed-mitre-joint",
 "name": "Keyed mitre joint (feather keys)",
 "kind": "hardware",
 "category": "Joinery",
 "group": "Mitre joints",
 "year": null,
 "question": "How do keys reinforce a mitre joint?",
 "tags": [
  "joinery",
  "woodworking joint",
  "3d printable",
  "connect 3d prints",
  "no glue",
  "stl",
  "step",
  "mitre joints"
 ],
 "aliases": [
  "keyed mitre",
  "feather key mitre",
  "mitre keys",
  "miter keys",
  "picture frame keys",
  "inglete con llaves",
  "Gehrung mit Federn"
 ],
 "overall_mm": {
  "length": 80,
  "width": 80,
  "height": 20
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 5,
 "url": "https://xemstudio.com/objects/keyed-mitre-joint/",
 "sheet_txt": "https://xemstudio.com/objects/keyed-mitre-joint/sheet.txt",
 "sheet": {
  "basis": "Xem Studio design — geometry computed in the generator from traditional proportions",
  "overall_mm": {
   "length": 80,
   "width": 80,
   "height": 20
  },
  "notes": [
   "Woodworking joint drawn for 3D printing: the parts lock together by shape, so a print can be joined without glue or screws. Drawn at true size with the parts line to line (zero gap) in their assembled position — add your printer's fit allowance to the mating faces (your AI or slicer can do this).",
   "Thin keys across the outside corner of a mitre (as on picture frames) lock it and show as stripes."
  ],
  "table": {
   "columns": [
    "dimension",
    "value"
   ],
   "rows": [
    [
     "stock",
     "20 × 20 mm square"
    ],
    [
     "parts",
     "part a, part b, key 1, key 2"
    ],
    [
     "mitre",
     "45°"
    ],
    [
     "keys",
     "two, 2.5 mm thick, 12 mm legs, across the outside corner"
    ],
    [
     "assembles",
     "close the mitre, slide the keys into the kerfs"
    ],
    [
     "holds",
     "the mitre against opening"
    ]
   ]
  }
 },
 "sheet_text": "Keyed mitre joint (feather keys) — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/keyed-mitre-joint/  (sheet CC BY 4.0; files Xem Studio Design License, https://xemstudio.com/license/)\nBasis: Xem Studio design — geometry computed in the generator from traditional proportions\nCatalog version: 2026-10-20\n\nOverall (mm): length 80.0, width 80.0, height 20.0\n- Woodworking joint drawn for 3D printing: the parts lock together by shape, so a print can be joined without glue or screws. Drawn at true size with the parts line to line (zero gap) in their assembled position — add your printer's fit allowance to the mating faces (your AI or slicer can do this).\n- Thin keys across the outside corner of a mitre (as on picture frames) lock it and show as stripes.\n\ndimension  value\nstock  20 × 20 mm square\nparts  part a, part b, key 1, key 2\nmitre  45°\nkeys  two, 2.5 mm thick, 12 mm legs, across the outside corner\nassembles  close the mitre, slide the keys into the kerfs\nholds  the mitre against opening\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Xem Studio: Joinery design (geometry computed in the generator from traditional proportions) — web — Xem Studio design — https://xemstudio.com/\n\nFree files (Xem Studio Design License, Xem Studio; STEP + STL, 5 parts): https://xemstudio.com/files/hardware/keyed-mitre-joint/index.json\nAPI: https://xemstudio.com/api/geometry?object=keyed-mitre-joint\n",
 "sources": [
  {
   "publisher": "Xem Studio",
   "title": "Joinery design (geometry computed in the generator from traditional proportions)",
   "url": "https://xemstudio.com/",
   "formats": [
    "web"
   ],
   "license": "Xem Studio design",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "splined-mitre-joint",
  "butterfly-key-joint"
 ],
 "fits": [],
 "dimensions": "exact (nominal, no printing tolerance)",
 "dimension_rule": "All geometry on Xem Studio is exact (nominal, true size) with no printing tolerance. Where a part meets another part, the object lists its mating features (feature, exact size, what it mates with, fit class: press, slide, run, socket, clamp or designed). Apply your process's allowance to those features only; 'designed' gaps are part of the design and stay as drawn.",
 "mating": [],
 "faq": [
  {
   "q": "Where do mitre keys go?",
   "a": "Across the outside corner, square to the frame face, one or two per corner."
  }
 ],
 "files_license": {
  "name": "Xem Studio Design License",
  "holder": "Xem Studio",
  "url": "https://xemstudio.com/license/",
  "note": "Xem Studio's own design: free to use, print, modify and sell things made from it; not to be republished or redistributed as files."
 },
 "offers": [
  {
   "file": "keyed-mitre-joint-part-a",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "Xem Studio Design License",
   "step": "https://xemstudio.com/files/hardware/keyed-mitre-joint/keyed-mitre-joint-part-a.step",
   "stl": "https://xemstudio.com/files/hardware/keyed-mitre-joint/keyed-mitre-joint-part-a.stl",
   "note": "Mitred member A with two key kerfs"
  },
  {
   "file": "keyed-mitre-joint-part-b",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "Xem Studio Design License",
   "step": "https://xemstudio.com/files/hardware/keyed-mitre-joint/keyed-mitre-joint-part-b.step",
   "stl": "https://xemstudio.com/files/hardware/keyed-mitre-joint/keyed-mitre-joint-part-b.stl",
   "note": "Mitred member B with two key kerfs"
  },
  {
   "file": "keyed-mitre-joint-key-1",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "Xem Studio Design License",
   "step": "https://xemstudio.com/files/hardware/keyed-mitre-joint/keyed-mitre-joint-key-1.step",
   "stl": "https://xemstudio.com/files/hardware/keyed-mitre-joint/keyed-mitre-joint-key-1.stl",
   "note": "Triangular key, 2.5 mm thick"
  },
  {
   "file": "keyed-mitre-joint-key-2",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "Xem Studio Design License",
   "step": "https://xemstudio.com/files/hardware/keyed-mitre-joint/keyed-mitre-joint-key-2.step",
   "stl": "https://xemstudio.com/files/hardware/keyed-mitre-joint/keyed-mitre-joint-key-2.stl",
   "note": "Triangular key, 2.5 mm thick"
  },
  {
   "file": "keyed-mitre-joint-assembled",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "Xem Studio Design License",
   "step": "https://xemstudio.com/files/hardware/keyed-mitre-joint/keyed-mitre-joint-assembled.step",
   "stl": "https://xemstudio.com/files/hardware/keyed-mitre-joint/keyed-mitre-joint-assembled.stl",
   "note": "All parts in their assembled position (each part its own solid)"
  }
 ],
 "markdown": "https://xemstudio.com/objects/keyed-mitre-joint/index.md"
}